Dravidian etymology :

Notes :A cultural term with an extremely low probability of being PDr; in fact, most of the forms can be explained as borrowings from Telugu (cf. also Tamil attam id., explicitly marked as a borrowing in DEDR). Nevertheless, the origins of the Telugu form are obscure; Burrow & Emeneau compare Prakrit addāa- 'mirror', but the word does not seem to have an IE etymology and may be of Dravidian origin. // Present in 3/6 branches.